Hannover 2020 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 37: Ultrashort Laser Pulses

Q 37.5: Vortrag

Mittwoch, 11. März 2020, 15:00–15:15, f435

Common pulse retrieval algorithm: a universal and accurate method to retrieve ultrashort pulses — •Nils C. Geib1, Heiko Knopf1,2, Gia Quyet Ngo1, Thomas Pertsch1,2, and Falk Eilenberger1,21Institute of Applied Physics, Abbe Center of Photonics, Friedrich Schiller University, Albert-Einstein-Str. 15, 07745 Jena, Germany — 2Fraunhofer Institute for Applied Optics and Precision Engineering IOF, Center for Excellence in Photonics, Albert-Einstein-Str. 7, 07745 Jena, Germany

Many ultrashort laser pulse measurement schemes such as frequency-resolved optical gating (FROG), interferometric FROG, dispersion scan, or time-domain ptychography require a specific, iterative algorithm to retrieve pulse amplitude and phase from the measurement. In this work, we present a common pulse retrieval algorithm (COPRA) that can be applied on a broad class of measurements, including but not limited to the aforementioned ones. It can also be universally applied to measurements for which no specific retrieval algorithm was known before. We test our approach on numerical and experimental data and show that it is reliable and accurate in the presence of Gaussian measurement noise. Furthermore, we discuss how to obtain reliable uncertainty estimates on the retrieved pulses.

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